NVIDIA GeForce GT 640 Rev. 2 vs NVIDIA GeForce GT 650M
Graphics Processor
| GPU model | GK208 | GK107 |
|---|---|---|
| GPU variant | GK208-400-A1 | N13P-GT-A2 |
| Architecture | Kepler 2.0 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 1,020 million | 1,270 million |
| Die size | 87 mm² | 118 mm² |
Graphics Card
| Release date | May 29th, 2013 | — |
|---|---|---|
| Generation | GeForce 600 | — |
| Production | End-of-life | — |
| Launch price | 89 USD | — |
| Interface | PCIe 2.0 x8 | — |
| Predecessor | GeForce 500 | — |
| Successor | GeForce 700 | — |
Clocks
| GPU clock | 1046 MHz | — |
|---|---|---|
| Memory clock | 1252 MHz 5 Gbps effective | 900 MHz 1800 Mbps effective |
| Base clock | — | 835 MHz |
| Boost clock | — | 950 MHz |
Memory Configuration
| Memory size | 1024 MB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | DDR3 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 40.06 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 384 | 384 |
|---|---|---|
| TMUs | 32 | 32 |
| ROPs | 8 | 16 |
| SMX count | 2 | 2 |
| Cache L1 | 16 KB (per SMX) | 16 KB (per SMX) |
| Cache L2 | 512 KB | 256 KB |
Performance
| Pixel rate | 8.368 GPixel/s | 7.600 GPixel/s |
|---|---|---|
| Texture rate | 33.47 GTexel/s | 30.40 GTexel/s |
| FP32 (float) performance | 803.3 GFLOPS | 729.6 GFLOPS |
| FP64 (double) performance | 33.47 GFLOPS (1:24) | 30.40 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Single-slot | — |
|---|---|---|
| Length | 145 mm 5.7 inches | — |
| TDP | 49 W | 45 W |
| Suggested PSU | 200 W | — |
| Outputs | 1x DVI1x HDMI1x VGA | No outputs |
| Power connectors | None | — |
| Board number | P2131 | — |
API Support & Features
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.1 | 1.1 |
| CUDA | 3.5 | 3.0 |
| Shader model | 5.1 | 5.1 |
Other Features
Mobile graphics
| Release date | — | Mar 22nd, 2012 |
|---|---|---|
| Generation | — | GeForce 600M |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | GeForce 500M |
| Successor | — | GeForce 700M |
